Mikulas Patocka 9df75cfc33 affs: fix remount failure when there are no options changed ... [ Upstream commit 01d6e08711 ] Commit c8f33d0bec ("affs: kstrdup() memory handling") checks if the kstrdup function returns NULL due to out-of-memory condition. However, if we are remounting a filesystem with no change to filesystem-specific options, the parameter data is NULL. In this case, kstrdup returns NULL (because it was passed NULL parameter), although no out of memory condition exists. The mount syscall then fails with ENOMEM. This patch fixes the bug. We fail with ENOMEM only if data is non-NULL. The patch also changes the call to replace_mount_options - if we didn't pass any filesystem-specific options, we don't call replace_mount_options (thus we don't erase existing reported options). Fixes: c8f33d0bec ("affs: kstrdup() memory handling") Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>		2016-06-06 19:12:35 -04:00
..
Changes	remove obsolete references to powertweak	2013-11-27 20:34:32 -08:00
Kconfig	fs/affs: remove depends on CONFIG_EXPERIMENTAL	2013-01-21 14:39:04 -08:00
Makefile	fs: change to new flag variable	2011-03-17 14:02:57 +01:00
affs.h	fs/affs/affs.h: add mount option manipulation macros	2015-04-17 09:04:08 -04:00
amigaffs.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
bitmap.c	fs/affs/bitmap.c: remove unnecessary return	2015-02-17 14:34:52 -08:00
dir.c	fs/affs: define AFFSNAMEMAX to replace constant use	2015-02-17 14:34:52 -08:00
file.c	Merge branch 'akpm' (patches from Andrew)	2015-04-17 09:04:38 -04:00
inode.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
super.c	affs: fix remount failure when there are no options changed	2016-06-06 19:12:35 -04:00
symlink.c	fs/affs: pr_debug cleanup	2014-06-06 16:08:13 -07:00